LP5990 - National Semiconductor

LP5990 Micropower 200mA CMOS Low Dropout Voltage Regulator

The LP5990 regulator is designed to meet the requirements of portable, battery-powered systems providing an accurate output voltage, low noise and low quiescent current. The LP5990 will provide a 1.8V output from a low input voltage of 2.2V and can provide 200mA to an external load. When switched into shutdown mode via a logic signal at the enable pin, the p.

Features

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■ Operation from 2.2V to 5.5V input ±1% accuracy over temp range Output voltage from 0.8V to 3.6V in 50mV increments 30 μA Quiescent current (enabled) 10nA Quiescent current (disabled) 160mV dropout at 200mA load 60 μVRMSOutput voltage noise 60 μs start-up time 500μs shut-down time PSRR 55 dB at 10 kHz Stable with 0402 1.0µF ceramic capacitors Logic controlled enable Thermal
  –overload and short
  –circuit protection Package 4-Bump micro SMD,0.4mm pitch (lead free) 866 µm x 917 µm Applications
■ Cellular phones
■ Hand
  –held information appliances Typical Application Circui.